How can I draw hysteresis loop using matlab

I have velocity ,v, and discharge, q, vectors . I want to draw hysteresis plot between the two. I used plot_dir function but it can't allow me to have the plot with good view and resolution. Is there any way of plotting it?

I used this function but failed

plot_dir(v,q)

Thanks for your help.

Any function that give that shows the beginning and end of successive points with arrow is acceptable. Thanks again.

Answer 1

[José-Luis]

x = rand(10,1);
y = rand(10,1);
quiver(x(1:end-1),y(1:end-1),diff(x),diff(y),0);

Please accept an answer if it helps you.

[ChristianW]

X = [-3:.2:3 3:-.2:-3];
Y = [tanh(X(1:length(X)/2)-1) tanh(X(length(X)/2+1:end)+1)];

patch(X,Y,[.5 1 .5]); hold on
quiver(X(1:end-1),Y(1:end-1),diff(X),diff(Y),0);

[José-Luis]

@ChristianW: showing off? :-)

[ChristianW]

Well, all I read were 2 words hysteresis and arrow. So I guess its a patch + a quiver whats needed.

[Sean de Wolski]

Nice!

[Ede gerlderlands]

Thanks all, You answered my questions . the arrow direction is not really distinguishable is there any way of improving it? it looks straight line rather than arrow...tnx